sons of dyer

I am looking for the four older sons of dyer ackerson and lillian snyder. they were (are) my older brothers. Lillian and my father Dyer divorced in the early fifties or late forties. realitives say the boys were adopted out, but I dont know this for sure. they lived in snohomish county washington, their names were Leslie Dyer jr. David and Im not sure what the youngest name was. I have never met them and very much would like to. or atleast know what happened to them. If anyone knows of these gentlemen or has any ideas how to find them I would greatly appreaciate it. thanks millions Betty